Global Patent Index - EP 3617549 A1

EP 3617549 A1 20200304 - WAVE GEAR DEVICE AND WAVE GENERATOR

Title (en)

WAVE GEAR DEVICE AND WAVE GENERATOR

Title (de)

WELLENGETRIEBEVORRICHTUNG UND WELLENGENERATOR

Title (fr)

DISPOSITIF D'ENGRENAGE À ONDES ET GÉNÉRATEUR D'ONDES

Publication

EP 3617549 A1 20200304 (EN)

Application

EP 17907861 A 20170428

Priority

JP 2017017030 W 20170428

Abstract (en)

A wave generator (4) of a wave gear device (1) flexes an externally toothed gear (3) into a shape along an elliptical closed curve (C0) to form engaging portions (5a, 5b) of the externally toothed gear (3) with an internally toothed gear (2) at two places, namely at both ends of the major axis (Lmax), and to move the engaging portions (5a, 5b) in the circumferential direction. The elliptical closed curve (C0) has a non-point symmetric shape. For example, the elliptical closed curve (C0) is a line symmetric closed curve that is not symmetric about the minor axis (Lmin), and is symmetric about only the major axis (Lmax). In the non-point symmetric state, the engaging portions (5a, 5b) are formed at both ends in the major axis direction. By selecting different shapes for the engaging portions at the two locations of the major axis, vibration attributed to a secondary angular transmission error component generated along with the rotation of the wave generator (4) can be reduced.

IPC 8 full level

F16H 1/32 (2006.01)

CPC (source: EP RU US)

F16H 1/32 (2013.01 - RU); F16H 49/00 (2013.01 - RU); F16H 49/001 (2013.01 - EP US); F16H 2049/003 (2013.01 - US)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3617549 A1 20200304; EP 3617549 A4 20200909; CN 110546401 A 20191206; JP 6710809 B2 20200617; JP WO2018198348 A1 20200109; KR 20190126127 A 20191108; RU 2730295 C1 20200821; TW 201839294 A 20181101; US 2020040978 A1 20200206; WO 2018198348 A1 20181101

DOCDB simple family (application)

EP 17907861 A 20170428; CN 201780089725 A 20170428; JP 2017017030 W 20170428; JP 2019515048 A 20170428; KR 20197029748 A 20170428; RU 2019129733 A 20170428; TW 107104951 A 20180212; US 201716603405 A 20170428